Two people stand across from each other, one on the end of the service
box and one on the baseline. First you start just throwing
the ball to your partner, letting it bounce once on the ground
before your partner catches the ball. Next, let your partner
throw the ball to you and hit it softly with your racket,
back to your partner. Your partner must catch the ball. Repeat
5 times. Then you can throw the ball to your partner and they
hit it 5 times. After that, just try to hit it back and forth,
letting it bounce once on the ground!